Could there really be any such thing as horrifying wickedness [if there were no God and we just evolved]? I don’t see how. There can be such a thing only if there is a way that rational creatures are supposed to live, obliged to live…. A [secular] way of looking at the world has no place for genuine moral obligation of any sort…and thus no way to say there is such a thing as genuine and appalling wickedness. Accordingly, if you think there really is such a thing as horrifying wickedness (…and not just an illusion of some sort), then you have a powerful…argument for the reality of God].